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PSTAT(8) FreeBSD System Manager's Manual PSTAT(8)
NAMEpstat, swapinfo -- display system data structures
SYNOPSISpstat [-Tfghkmnst] [-Mcore [-Nsystem]]
swapinfo [-ghkm] [-Mcore [-Nsystem]]
DESCRIPTION
The pstat utility displays open file entry, swap space utilization, ter-
minal state, and vnode data structures.
If invoked as swapinfo the -s option is implied, and only the -k, -m, -g,
and -h options are legal.
If the -M option is not specified, information is obtained from the cur-
rently running kernel via the sysctl(3) interface. Otherwise, informa-
tion is read from the specified core file, using the name list from the
specified kernel image (or from the default image).
The following options are available:
-n Print devices out by major/minor instead of name.
-h ``Human-readable'' output. Use unit suffixes when printing swap
partition sizes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and
Petabyte.
-k Print sizes in kilobytes, regardless of the setting of the
BLOCKSIZE environment variable.
-m Print sizes in megabytes, regardless of the setting of the
BLOCKSIZE environment variable.
-g Print sizes in gigabytes, regardless of the setting of the
BLOCKSIZE environment variable.
-T Print the number of used and free slots in several system tables.
This is useful for checking to see how large system tables have
become if the system is under heavy load.
-f Print the open file table with these headings:
LOC The core location of this table entry.
TYPE The type of object the file table entry points to.
FLG Miscellaneous state variables encoded thus:
R open for reading
W open for writing
A open for appending
I signal pgrp when data ready
CNT Number of processes that know this open file.
MSG Number of messages outstanding for this file.
DATA The location of the vnode table entry or socket structure
for this file.
OFFSET The file offset (see lseek(2)).
-s Print information about swap space usage on all the swap areas
compiled into the kernel. The first column is the device name of
the partition. The next column is the total space available in
the partition. The Used column indicates the total blocks used
so far; the Available column indicates how much space is remain-
ing on each partition. The Capacity reports the percentage of
space used.
If more than one partition is configured into the system, totals
for all of the statistics will be reported in the final line of
the report.
-t Print table for terminals with these headings:
LINE Device name.
INQ Number of characters that can be stored in the input
queue.
CAN Number of characters in the input queue which can be
read.
LIN Number of characters in the input queue which cannot be
read yet.
LOW Low water mark for input.
OUTQ Number of characters that can be stored in the output
queue.
USE Number of bytes in the output queue.
LOW Low water mark for output.
COL Calculated column position of terminal.
SESS Kernel address of the session structure.
PGID Process group for which this is the controlling terminal.
STATE Miscellaneous state variables encoded thus:
I init/lock-state device nodes present
C callout device nodes present
O opened
c console in use
G gone
B busy in open(2)
Y send SIGIO for input events
L next character is literal
H high watermark reached
X open for exclusive use
S output stopped (ixon flow control)
l block mode input routine in use
Z connection lost
s i/o being snooped
b busy in read(2) or write(2)
The `i' and `o' characters refer to the previous charac-
ter, to differentiate between input and output.
-M Extract values associated with the name list from the specified
core.
-N If -M is also specified, extract the name list from the specified
system instead of the default, which is the kernel image the sys-
tem has booted from.
SEE ALSOps(1), systat(1), stat(2), fs(5), iostat(8), vmstat(8)
K. Thompson, UNIXImplementation.
HISTORY
The pstat utility appeared in 4.0BSD.
BUGS
Does not understand NFS swap servers.
FreeBSD 9.0 August 20, 2008 FreeBSD 9.0